Safety nut



Patented Oct. 6, 1925.

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ALEX SZABO AND PETER BALOGI-I, or PERTH AMBOY, NEW JERSEY.

sAEETY NUT.

Application filed October 29, 1924. Serial N0..746,482.

To all whom it may 0012/00/11:

Be itv known that we, ALEX SZABO and PETER BALOGH, both citizens of Hungary. residing at Perth Amboy, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Safety Nuts, of which the following is a specification.

This invention relates to nut locks, the

invention having for an object to provide.

a novel and improved form of nut' lock that will securely lock the nut to the bolt, while permitting ready removal of the nut when desired.

- For further comprehension of the invention and of the objects and advantages thereof, reference will be had to the follow ing description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawing is a perspective View of a nut provided with our improved locking means.

Fig. 2 is an end view with the face plate of the nut removed.

Fig. 3 is a longitudinal sectional view taken on the line 33 of Fig. 2 and showing the face plate in place on the nut.

Fig. 4 is a similar view to Fig. 1 but showing a modified construction.

In the drawing the reference numeral 10 indicates a bolt of ordinary construction, and a nut 11 screwed thereon, our improved locking means being applied to the nut and requiring no special construction of the bolt, or modification of the latter in any manner. The nut locking means comprises a rotary plug 12 of cylindrical form that is positioned in a boring or socket 13 sunk into the outer face of the nut in one corner thereof and parallel to the axis of the nut. The intervening wall between the socket 13 i and the bore of the nut is cut away to leave a vertical slot 15 that accommodates the bolt gripping elements. These bolt gripping elements are comprised by a number of teeth,

16 formed on the edge of a rib 17 projected from one side of the plug 12 and extending longitudinally of the latter, the teeth on the rib conforming in pitch and configuration to the threads on the bolt.

The plug 12 is placed at such distance from the bore of the nut that the teeth 16 will project 'a slight distance into said bore when the rib is swung to a radial position,

so that when the nut is screwed on the bolt the teeth will tend to wedge against the threads on the bolt. The plug is held in position with the teeth thereon bearing against the threads on the bolt by means of a coiled tension spring 20 located in a recess 21 in the face of the nut and connected at one end to a screw 22 threaded into a socket 1 in the latter and at its opposite end to an arm 23 fixed to and projecting laterally from the plug, this arm being accommodated in the recess 21. A faceplate 24 is secured as by the screws 25 on the face of the nut and serves to cover the end of the plug 12, and the recess21. When applying the device to a bolt the plug 12 is adjusted longitudinally a sufficient distance to To retain the locking member in released position a detent latch 32 is pivoted on the face plate 24 and may be swung to position engaging the arm 23 after the latter has been swung to releasing position. To hold the locking member in operative position we may loop a wire 33 through apertures 34 and 35 in the end of the arm 23 and the face plate 24 respectively. The ends of this wire may be twisted together.

The form of the device shown in Fig. 4 differs from that above described only in a different positioning of the latch 32.

Having thus described our invention, what we claim as new and desire to protect by Letters Patent of the United States is as follows 1. In a nut look, a nut having a socket entered thereinto from the face thereof parallel to the bore of the nut, a plug rotatably mounted in said socket, and projections on one side of the plug adapted to be projected into the marginal portion of the bore of the nut by rotation of the plug, said projections comprising teeth formed in correspondence to the threads of the nut, and

To facilitate this adjustment a I u 'ing the latter against the said '1 ei'eui in registry with the end of the plug to receive a tool to; moving the nut longitudinally against the pressure of said spring.

In testimony Whei'eo't We have affixed our 20 gnatui'es.

ALEX SZABO. PETER BALOGH.

faceplate havingan eper- 15 

